Does the pre-roll video only appear on my Maestro channel? Olivia Friedlander May 05, 2017 22:26 Updated Follow Yes. For additional information about how pre-roll videos work please see here. Related articles How do pre-roll videos work on Maestro? Do ads appear on Mobile? How do I set sidebar ads on my channel? Can I geo-target my ads? Comments 0 comments Please sign in to leave a comment.